Yea i know by getting the 3590 they are more efficient but the biggest cob that will fit in my optic 4 is the cxb2540 im not wanting to replace the optic 4 jus wanna make it better.
Ok so i have a optic 4 led grow light and i was planning on taking out the cxa2530 cobs and putting in cxb2540s in there place.ive already took apart the light to see what im going to need just the leds and thermal pads. Let me know what u guys think. Leds n pads r like $60